Building modbus on Windows 11

[AbdallaDalleh]

Environment:
Windows 11
VS 2022 (latest)
MSVC 143 (latest)
EPICS Base 7.0.9
Modbus (latest)

We rarely build EPICS on Windows so I understand I might be missing something. I came up into building modbus and several other modules under Windows 11, everything built fine except modbus. I got compiler error C2589 on this line https://github.com/epics-modules/modbus/blob/master/modbusApp/src/drvModbusAsyn.cpp#L520 and several others, all the errors have to do with std::min. After research I came into this old thread https://stackoverflow.com/questions/5004858/why-is-stdmin-failing-when-windows-h-is-included and both these solutions work:

1. Explicitly specify template data type, i.e. std::min<int>
2. Use parenthesis (std::min) to prevent the MSVC preprocessor from using its own min macros.

Let me know if this is OK so I can submit a PR! 👍

[MarkRivers]

@AbdallaDalleh I was able to reproduce the problem. It seems to have been introduced in Windows 11, since I am sure this built fine with Windows 10.

I have pushed a fix. I also fixed several compiler warnings, and removed some residual debugging code that called errlogPrintf in readFloat64Array.